Meteoritical Bulletin: Entry for Northwest Africa 7875

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Northwest Africa 7875

Basic information

Name: Northwest Africa 7875
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7875
Observed fall: No
Year found: 2013
Country: Morocco
Mass: 476 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	H7
Recommended:			H7 [explanation]

This is 1 of 31 approved meteorites classified as H7. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 29 May 2013

Writeup

help

Writeup from MB 102:

Northwest Africa 7875 (NWA 7875)

Morocco

Purchased: Feb 2013

Classification: Ordinary chondrite (H7)

History: Purchased by Mendy Ouzillou from a Moroccan meteorite dealer, February 2013.

Physical characteristics: Single stone, dark-brown exterior, saw cuts reveal many sub-millimeter metal blebs, but a few up to 3 mm, set in a fine-grained, dark-brown, crystalline matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a recrystallized chondritic texture though lacking chondrules. Plagioclase up to 200 μm, numerous texturally equilibrated metal domains 300-500 μm, ~50% of metal is oxidized, oxide veinlets throughout.

Geochemistry: (C. Agee and L. Burkemper, UNM) Fa_19.2±0.1, Fe/Mn=39±1, n=5; low-Ca pyroxene Fs_16.5±0.3Wo_4.2±0.8, Fe/Mn=24±1, n=6; high-Ca pyroxene Fs_9.2±0.2Wo_37.4±1.0, Cr₂O₃=1.32 wt%, Fe/Mn=19±1, n=2; plagioclase Ab₇₀An₂₇Or_2.

Classification: Ordinary chondrite (H7), type 7 based on high Wo-content in orthopyroxene and absence of chondrules, weathering grade W2.

Specimens: 21 g including a probe mount on deposit at UNM, Mendy Ouzillou holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P Feb 2013
Mass (g):	476
Pieces:	1
Class:	H7
Weathering grade:	W2
Fayalite (mol%):	19.2±0.1
Ferrosilite (mol%):	16.5±0.3, 9.2±0.2
Wollastonite (mol%):	4.2±0.8, 37.4±1.0
Classifier:	C. Agee, UNM
Type spec mass (g):	21
Type spec location:	UNM
Main mass:	Mendy Ouzillou
Comments:	Submitted by C. Agee

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

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Geography:

Morocco

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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